An abscess is a tender mass generally surrounded by a coloured area from pink to deep red. Abscesses are often easy to feel by touching. Abscesses can show up any place on body. Abscess is painful and warm to touch. The most common sites are in armpits (axillae), areas around the anus and vagina(Bartholin gland abscess), the base of the spine (pilonidal abscess), around a tooth (dental abscess), and in groins.Inflammation around a hair follicle can also lead to the formation of an abscess, which is called a boil (furuncle). In general an abscess must open and drain in order to improve. Sometimes draining occurs on its own, but generally it must be opened by a doctor in a procedure called incision and drainage.